qemu

single_cpdo.c (5502B)

---

 /*
     NetWinder Floating Point Emulator
     (c) Rebel.COM, 1998,1999
 
     Direct questions, comments to Scott Bambrough <scottb@netwinder.org>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
     along with this program; if not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "qemu/osdep.h"
 #include "fpa11.h"
 #include "fpu/softfloat.h"
 #include "fpopcode.h"
 
 float32 float32_exp(float32 Fm);
 float32 float32_ln(float32 Fm);
 float32 float32_sin(float32 rFm);
 float32 float32_cos(float32 rFm);
 float32 float32_arcsin(float32 rFm);
 float32 float32_arctan(float32 rFm);
 float32 float32_log(float32 rFm);
 float32 float32_tan(float32 rFm);
 float32 float32_arccos(float32 rFm);
 float32 float32_pow(float32 rFn,float32 rFm);
 float32 float32_pol(float32 rFn,float32 rFm);
 
 unsigned int SingleCPDO(const unsigned int opcode)
 {
    FPA11 *fpa11 = GET_FPA11();
    float32 rFm, rFn = float32_zero;
    unsigned int Fd, Fm, Fn, nRc = 1;
 
    Fm = getFm(opcode);
    if (CONSTANT_FM(opcode))
    {
      rFm = getSingleConstant(Fm);
    }
    else
    {
      switch (fpa11->fType[Fm])
      {
         case typeSingle:
           rFm = fpa11->fpreg[Fm].fSingle;
         break;
 
         default: return 0;
      }
    }
 
    if (!MONADIC_INSTRUCTION(opcode))
    {
       Fn = getFn(opcode);
       switch (fpa11->fType[Fn])
       {
         case typeSingle:
           rFn = fpa11->fpreg[Fn].fSingle;
         break;
 
         default: return 0;
       }
    }
 
    Fd = getFd(opcode);
    switch (opcode & MASK_ARITHMETIC_OPCODE)
    {
       /* dyadic opcodes */
       case ADF_CODE:
          fpa11->fpreg[Fd].fSingle = float32_add(rFn,rFm, &fpa11->fp_status);
       break;
 
       case MUF_CODE:
       case FML_CODE:
         fpa11->fpreg[Fd].fSingle = float32_mul(rFn,rFm, &fpa11->fp_status);
       break;
 
       case SUF_CODE:
          fpa11->fpreg[Fd].fSingle = float32_sub(rFn,rFm, &fpa11->fp_status);
       break;
 
       case RSF_CODE:
          fpa11->fpreg[Fd].fSingle = float32_sub(rFm,rFn, &fpa11->fp_status);
       break;
 
       case DVF_CODE:
       case FDV_CODE:
          fpa11->fpreg[Fd].fSingle = float32_div(rFn,rFm, &fpa11->fp_status);
       break;
 
       case RDF_CODE:
       case FRD_CODE:
          fpa11->fpreg[Fd].fSingle = float32_div(rFm,rFn, &fpa11->fp_status);
       break;
 
 #if 0
       case POW_CODE:
          fpa11->fpreg[Fd].fSingle = float32_pow(rFn,rFm);
       break;
 
       case RPW_CODE:
          fpa11->fpreg[Fd].fSingle = float32_pow(rFm,rFn);
       break;
 #endif
 
       case RMF_CODE:
          fpa11->fpreg[Fd].fSingle = float32_rem(rFn,rFm, &fpa11->fp_status);
       break;
 
 #if 0
       case POL_CODE:
          fpa11->fpreg[Fd].fSingle = float32_pol(rFn,rFm);
       break;
 #endif
 
       /* monadic opcodes */
       case MVF_CODE:
          fpa11->fpreg[Fd].fSingle = rFm;
       break;
 
       case MNF_CODE:
          fpa11->fpreg[Fd].fSingle = float32_chs(rFm);
       break;
 
       case ABS_CODE:
          fpa11->fpreg[Fd].fSingle = float32_abs(rFm);
       break;
 
       case RND_CODE:
       case URD_CODE:
          fpa11->fpreg[Fd].fSingle = float32_round_to_int(rFm, &fpa11->fp_status);
       break;
 
       case SQT_CODE:
          fpa11->fpreg[Fd].fSingle = float32_sqrt(rFm, &fpa11->fp_status);
       break;
 
 #if 0
       case LOG_CODE:
          fpa11->fpreg[Fd].fSingle = float32_log(rFm);
       break;
 
       case LGN_CODE:
          fpa11->fpreg[Fd].fSingle = float32_ln(rFm);
       break;
 
       case EXP_CODE:
          fpa11->fpreg[Fd].fSingle = float32_exp(rFm);
       break;
 
       case SIN_CODE:
          fpa11->fpreg[Fd].fSingle = float32_sin(rFm);
       break;
 
       case COS_CODE:
          fpa11->fpreg[Fd].fSingle = float32_cos(rFm);
       break;
 
       case TAN_CODE:
          fpa11->fpreg[Fd].fSingle = float32_tan(rFm);
       break;
 
       case ASN_CODE:
          fpa11->fpreg[Fd].fSingle = float32_arcsin(rFm);
       break;
 
       case ACS_CODE:
          fpa11->fpreg[Fd].fSingle = float32_arccos(rFm);
       break;
 
       case ATN_CODE:
          fpa11->fpreg[Fd].fSingle = float32_arctan(rFm);
       break;
 #endif
 
       case NRM_CODE:
       break;
 
       default:
       {
         nRc = 0;
       }
    }
 
    if (0 != nRc) fpa11->fType[Fd] = typeSingle;
    return nRc;
 }
 
 #if 0
 float32 float32_exp(float32 Fm)
 {
 //series
 }
 
 float32 float32_ln(float32 Fm)
 {
 //series
 }
 
 float32 float32_sin(float32 rFm)
 {
 //series
 }
 
 float32 float32_cos(float32 rFm)
 {
 //series
 }
 
 float32 float32_arcsin(float32 rFm)
 {
 //series
 }
 
 float32 float32_arctan(float32 rFm)
 {
   //series
 }
 
 float32 float32_arccos(float32 rFm)
 {
    //return float32_sub(halfPi,float32_arcsin(rFm));
 }
 
 float32 float32_log(float32 rFm)
 {
   return float32_div(float32_ln(rFm),getSingleConstant(7));
 }
 
 float32 float32_tan(float32 rFm)
 {
   return float32_div(float32_sin(rFm),float32_cos(rFm));
 }
 
 float32 float32_pow(float32 rFn,float32 rFm)
 {
   return float32_exp(float32_mul(rFm,float32_ln(rFn)));
 }
 
 float32 float32_pol(float32 rFn,float32 rFm)
 {
   return float32_arctan(float32_div(rFn,rFm));
 }
 #endif